של־

From שֶׁ־‎ (she-, “that, which”) + לְ־‎ (l'-, “to”). Attested since Mishnaic Hebrew. More recently supplanted by the standalone form שֶׁל‎ (shél), but the inflected forms are unchanged.

שֶׁלְּ־‎ • (shel'-)

1. (archaic) Alternative form of שֶׁל‎ (shel); not used predicatively.

• This form also frequently results from שֶׁ־‎ (she-) + לְ־‎ (l'-).
• See usage notes at שֶׁל‎ (shel).
• Like all prepositional compounds ending in לְ־‎ (l'-), שֶׁלְּ־‎ undergoes vowel modifications, and merges with a following definite article; see usage notes at לְ־‎.